: API-5D Valves test pressure

From: <elie>
Date: Tue Apr 05 2005 - 21:05:00 EDT

Background Information
API-5D (Table 5.1) gives the minimum shell test pressure for valves as 1.5% of rated MAOP. Example: ANSI Class 150, the min. shell test pressure is 425 psi.

During hydro test of long section of a piping system including valves, we state that the mini. test pressure is 425 psi. Since we cannot maintain the exact pressure, we typically use a range of test pressure, i.e. 425-475 psig, Assuming 100% Yield of pipe is >500 psig.

Question:
What is the maximum pressure that we are allowed to use on the valve?
Where in the Code (and which Code)I can find this information?

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